That's a Pacenti release of the triplet hub that White Industries made. They made their first hub collaborating with Troy Watson many years ago.
The rim I used is a Pacenti V1. He had 27 spoke rims drilled so that they follow a 36 spoke spacing, but skip every 4th spoke hole. For this build I used Pillar Ti bladed spokes for the right side and Sapim CX-Ray spokes for the left. It was bit experimental in spoke choice just to see if I would like it. Honestly I don't have a lot of miles on this wheel since I've had a bunch of other projects going on. I did make the same build for my riding buddy using all CX-Ray spokes. He's been riding it a lot with great results.
The Martindale will be the 3rd release of basically the same hub from WI and they are charging the most money for it. It will be a nice hub.
Once thing I've noticed about all the triplet specific builds I've done. You are forced to use a straight drilled rim (spoke holes can't angle to one flange). I've yet to see a rim that angles the holes for the triplet pattern. This results in a rather extreme angle that the spokes exit the NDS nipples since the left flange is pushed so far out. I'm keeping an eye on my friend's build for any premature spoke breaking, but don't have enough long term experience to say it will or will not fail sooner than a standard build.
Here are a couple of builds I've done.
Troy's second generation hub manufactured by Industry 9. Pacenti rim again.
This hub never made it into production as far as I know (different company).